I just saw tonight the 3rd part of Divergent. And I was bluffed by the scenario, the acting of the characters essentially. Last year, I saw the 2nd part without knowing the plot. And I just caught up this week by viewing the 1st part and re-watching "Insurgent" to have a fresh feeling. And I don't regret it. "Allegiant" is more cerebral, there's less action I think. The political and philosophical aspects of the story are better explained here. I liked to see the characters play their part independently, to see them struggle with their own issues. Even if their problems are intertwined with the others. They are a perfect team of saviors. Jeff Daniels as David is excellent. We can see that Tris and Tobias have matured a lot. They still form a great pair. The visual and FX effects were amazing. And finally, just as a joke, it was pleasant to not listen the name Jeanine pronounced so often (my name is "Jeanine").
Review of Allegiant
